The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A117268 Triangle, binomial transform of the tribonacci sequence. 2
 1, 1, 1, 2, 1, 2, 4, 2, 3, 5, 7, 4, 6, 9, 14, 13, 7, 11, 17, 26, 40, 24, 13, 20, 31, 48, 74, 114, 44, 24, 37, 57, 88, 136, 210, 324, 81, 44, 68, 105, 162, 250, 386, 596, 920 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Leftmost column of the triangle = the tribonacci sequence A000073. Rightmost diagonal of the triangle = A117189. LINKS Table of n, a(n) for n=1..45. FORMULA Difference rows of A117267 become rows of A117268 EXAMPLE Taking difference rows of A117267: (1; 1, 2; 2, 3, 5; 4, 6, 9, 14;...), we get A117268: 1; 1, 1; 2, 1, 2; 4, 2, 3, 5; 7, 4, 6, 9, 14; 13, 7, 11, 17, 26, 40; 24, 13, 20, 31, 48, 74, 114; ... CROSSREFS Cf. A117267, A117189 (row sums), A000073. Sequence in context: A184990 A206299 A276053 * A361076 A279709 A261880 Adjacent sequences: A117265 A117266 A117267 * A117269 A117270 A117271 KEYWORD nonn,tabl AUTHOR Gary W. Adamson, Mar 05 2006 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 30 04:40 EDT 2023. Contains 365781 sequences. (Running on oeis4.)